摘要:
Calix[6] arene hydroxamic derivatives were synthesized by two steps using calix[6] arene, ethyl bromoacetate and hydroxylamine hydrochloride as the main raw materials, and were characterized by infrared spectroscopy. The extraction of U(VI) by calix[6] arene and its hydroxamic derivatives on various experimental conditions were studied. The extraction results showed that pH played an important role in the extraction system. Maximum extraction was observed at a pH of 5.0 within 20 min, and the dynamic extraction model corresponded to a pseudo-second order model.
摘要:
The process of rock blasting involves large deformation of rock mass,material nonlinear,and so on, the research on the mechanism of it is still in the stage of exploration at present. This article attempts to analyze the propagating of the stress wave in the explosions from the microscopic view. We simulate the whole transmission process of explosive stress wave,and obtain the change laws between stress wave with the distances from center of explosion on the basis of the previous theoretical analysis and model experiment. And then compared the results of model calculation with the result of this experiment,The result show the applicability of the simulation results.This paper discloses the motion of particles in the blast from the microscopic view, it is helpful for us to study more complicated geotechnical problem in meso-scale simulation, so as to provide experience for reference.
作者机构:
[Zhu, Lei; Xiong, Zhengwei; Wang, Jingsong] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Guo, Qingwei] South China Inst Environm Sci MEP, Guangzhou 510632, Guangdong, Peoples R China.;[Sun, Ping; Zhang, Weiming] Nanjing Univ, Sch Environm, Nanjing 210046, Jiangsu, Peoples R China.
会议名称:
3rd International Conference on Material, Mechanical and Manufacturing Engineering (IC3ME)
会议时间:
JUN 27-28, 2015
会议地点:
Guangzhou, PEOPLES R CHINA
会议主办单位:
[Zhu, Lei;Wang, Jingsong;Xiong, Zhengwei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.^[Guo, Qingwei] South China Inst Environm Sci MEP, Guangzhou 510632, Guangdong, Peoples R China.^[Zhang, Weiming;Sun, Ping] Nanjing Univ, Sch Environm, Nanjing 210046, Jiangsu, Peoples R China.
会议论文集名称:
AER-Advances in Engineering Research
关键词:
electrolytic method;recovery of nickel;electroplating wastewater;electrolytic parameters
摘要:
Electrolytic method is applied to recover nickel from the simulated nickel-containing electroplating wastewater. The experiment studied the main parameters affecting the recovery of nickel, including titanium plate, titanium mesh and graphite as cathode materials, other parameters such as initial concentration of nickel ions, voltage, plate distance, temperature and initial pH value. During the experiment, changing one parameter and keeping the other parameters constant for 6 hours and the recovery and current efficiency are used as evaluation indexes to describe the results of experiment. It's noticed that titanium plate is the optimum cathode and under the condition of initial concentration of nickel ions 20g/L, voltage 4.0V, plate distance 15mm, temperature 50 degrees C and initial pH value 7.0, the recovery efficiency reaches the maximum of 73.12% and the current efficiency is 59.26%.
作者机构:
[Fu, Zhi-Qiu; Liang, Jing-Jing; Chai, Xu-Sheng; Ye, Ya-Ling; Guo, Lan-Xia; Peng, Xiao-Yong] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
会议名称:
International Conference on Energy and Environment Engineering (ICEEE)
会议时间:
APR 11-12, 2015
会议地点:
Nanjing, PEOPLES R CHINA
会议主办单位:
[Chai, Xu-Sheng;Peng, Xiao-Yong;Guo, Lan-Xia;Liang, Jing-Jing;Fu, Zhi-Qiu;Ye, Ya-Ling] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
关键词:
Bag Filter;Numerical Simulation;Flow Field;Uniformity of Air Flow
摘要:
Based on CFD technology, the present paper is aimed at using numerical simulation to analyze uniformity of air flow of downward inlet and external filtration style bag filter under different inlet air velocities. The simulation results show that the distribution of air flow in jet direction on both sides of the filter bags is higher under different inlet air velocities in bag filter. On condition of inlet air velocity is 5.8m/s, 6.9m/s, 8.1m/s, 9.3m/s respectively, the maximum relative deviation of filter bag flow distribution is 24.54%, 26.93%, 29.27%, 31.38%, as the velocity increases, the inhomogeneity of air flow distribution increases. Based on the characteristics of air flow distribution under the same inlet air velocity, through the measures such as expanding joint area of inlet air duct and filter, baffle and blunt body are installed in ash hopper, it not only reduces the flow difference of filter bag to make the maximum relative deviation of the filter bag less than 15%, improved the phenomenon of uneven air distribution, but also reduces the filter resistance by 9Pa-47Pa than that before optimization (5.8m/s-9.3m/s).
摘要:
The different values of pH, EPS dosage, initial uranium concentration, dialysis temperature and other factors, were investigated of anaerobic sludge extracellular polymer (EPS) on U (VI) in wastewater by adsorption effect. The results show that, the best pH of EPS adsorption of uranium is 6, when the initial concentration of uranium is 20mg/L, EPS dosage is 56.1 g/L, the removal rate can reach 98.3%. The maximum adsorption capacity of U (VI) is 0.891mg/g EPS.
摘要:
Refrigerated truck as the research object, using the CFD numerical simulation software simulate the dynamic temperature field of refrigerated truck with a internally suction type air curtain, it emphatically analyzes the influence of the export velocity of the internally suction type air curtain to the refrigerated truck's heat preservation performance when door is opened. The results show that the suitable export velocity of the air curtain can improve the insulation performance of the refrigerated truck, but when the export velocity is too large, the opening of the air curtain not only can not improve the heat preservation performance of refrigerated truck, but aggravate the heat and mass exchange between inside cold air and outside hot air. From the perspective of energy saving, researching the best export velocity of air curtain to insure that refrigerated truck has the best heat preservation performance, which will has great significance to the refrigerated truck's energy-saving design.
关键词:
rock material biaxial compression test;particle flow code in two dimensions;crack initiation;crack number
摘要:
A rock material biaxial compression test simulation based on the contact constitutive model for brittle rocks is built in this paper by the aid of particle flow code in two dimensions, which is on the basis of parameter sensitivity analysis and analysis by inversion to get the microscopic model parameters. Furthermore, a rock sample with intermittent single joint containing different angle is established on the basis of adaptability, which analyzed new crack initiation in the process of rock in compression, extension, damage and the crack under different joint angle to carry out the whole process, crack number change process by combining the energy dissipation mechanism. It is shown that the extension process of jointed rock mass is essentially driven by energy release of dynamic instability phenomenon caused by the energy dissipation. The destruction form, peak stress and crack number of jointed rock mass are related to joint angle which shows the overall performance: lager the joint angle is, the greater the peak stress of rock mass damage will be, the more the number of rock's crack will be.
通讯机构:
[Yang, Jin-hui] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
International Conference on Sensors, Mechatronics and Automation (ICSMA)
会议时间:
DEC 24-25, 2013
会议地点:
Shenzhen, PEOPLES R CHINA
会议主办单位:
[Yang, Jin-hui;Dai, Shi-liang;Pan, Xiao-kang;Liu, Li;Zhou, Shu-kui;Wang, Jin-song] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称:
Applied Mechanics and Materials
关键词:
H2SO4;Uranium;Volumetry
摘要:
T he uranium ore sample is dissolve with H2SO4, HF and H2O2. Uranium (VI) is reduced to uranium (IV) by titanous. The excess titanous is oxidized with sodium nitrite and excess sodium nitrite is destroyed with urea. Uranium can be determined by ammonium vanadate volumetry in the medium of 6 mol/L sulfuric acid taking o-phenanthroline ferrous sulfate as indicators. The determination limit is 0.03%, the RSD is better than 3%, the recovery is 95 similar to 105%. The error is less than 2% compared with the standard sample of uranium ore.
摘要:
Calix[6]arene carbon chain alkyl sulfoxide derivative have been successfully synthesized. IR spectra confirmed the introduction of sulfoxide group on calix[6]arene. UV spectra indicated that calix[6]arene sulfoxide derivative has a high complexation of uranium. The coordination ratio between the calix[6]arene sulfoxide derivative with uranium is 3:2, which was determined by Job’s method. Extraction experiments showed that the extraction efficiency of uranium is able to achieve 73.8%, which suggested the potential application of calix[6]arene sulfoxide derivative as an excellent uranium extraction agent.
作者机构:
[Liu, Zehua; Liao, Yan; Yu, Haoping] Univ South China Prov Hunan, Sch Urban Construct, Changsha, Hunan, Peoples R China.
通讯机构:
[Liu, Zehua] U;Univ South China Prov Hunan, Sch Urban Construct, Changsha, Hunan, Peoples R China.
会议名称:
3rd International Conference on Energy, Environment and Sustainable Development (EESD 2013)
会议时间:
NOV 12-13, 2013
会议地点:
Shanghai, PEOPLES R CHINA
会议主办单位:
[Liu, Zehua;Liao, Yan;Yu, Haoping] Univ South China Prov Hunan, Sch Urban Construct, Changsha, Hunan, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Air infiltration;Numerical simulation;Thermal environment;Window gap
摘要:
The paper presents a numerical simulation study of indoor thermal environment of an air conditioning office in winter in Hengyang. Considering the effect of air infiltration from window gap, the distribution of indoor temperature field, velocity field and humidity field can be obtained when air supply angle is 45° down to the horizontal direction. Compared with simulation which air infiltration is ignored, the results show that average temperature of air conditioning area reduces 0.6 °C in Y = 1.1 m section. Air velocity is larger in Y = 1.1 m air conditioning zone. The air speed is greater than 0.2 m/s in local area, a sense blowing. Average relative humidity is larger in Y = 1.1 m air conditioning area. The research indicates that air infiltration can not be allowed to be neglected in numerical simulation.
通讯机构:
[Zhu, Feng] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
International Conference on Materials, Mechanical and Manufacturing Engineering (IC3ME 2013)
会议时间:
OCT 19-20, 2013
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Zhu, Feng;Duan, Zhongyuan;Wu, Zhenyu;Wu, Yuqi;Li, Tianlong;Cai, Yanda] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Creep characteristics;Long-term strength;Red layer sliding zone soil
摘要:
The creep characteristics of red layer sliding soil under the condition of different vertical loads and water contents were studied through a series of direct shear creep tests. Tests results showed that the water infiltrated to the sliding zone along the fissure of red layer sliding belt due to the crush of red layer sliding rock, leading to softening of sliding zone and acceleration of shear creep. When the shear stress reached the limit of long-term shear strength, sliding soil was broken suddenly with small vertical loads (50 kPa and 100kPa), while the sliding soil presented as a constant acceleration creep with enough vertical loads (200 kPa and 300 kPa). The inflection point in shear stress-shear displacement isochronous curve corresponded to the long-term strength of the soil.
作者机构:
[Xie, Lei; Wang, Jingsong; Zou, Xiaoliang; Jia, Liang] Univ South China, Key Lab Pollut Control & Resource Reuse Hunan Pro, Hengyang 421001, Hunan, Peoples R China.;[Guo, Qingwei] S China Inst Environm Sci, MEP, Guangzhou 510655, Guangdong, Peoples R China.
通讯机构:
[Jia, Liang] U;Univ South China, Key Lab Pollut Control & Resource Reuse Hunan Pro, Hengyang 421001, Hunan, Peoples R China.
会议名称:
International Conference on Materials, Mechanical and Manufacturing Engineering (IC3ME 2013)
会议时间:
OCT 19-20, 2013
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Jia, Liang;Wang, Jingsong;Zou, Xiaoliang;Xie, Lei] Univ South China, Key Lab Pollut Control & Resource Reuse Hunan Pro, Hengyang 421001, Hunan, Peoples R China.^[Guo, Qingwei] S China Inst Environm Sci, MEP, Guangzhou 510655, Guangdong, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Adsorption;Chitosan;Cr (VI);Hydroxamated
摘要:
This paper aims to investigate the adsorption of Cr (VI) by cross-linked magnetic hydroxamated chitosan (MHCTS). The adsorption experiments were carried out in batch systems. To determine the optimum condition of the adsorption, factors such as pH, reaction time, initial Cr (VI) concentration and adsorbent dosage were considered. The experimental results showed that MHCTS can adsorb Cr (VI) with high efficiency. Optimum adsorption was observed at pH 4.0, and the highest adsorption removal reached 99.2%. The equilibrium was established within 90 min. The process could be described by pseudo-first-order and pseudo-second-order kinetic model.
摘要:
In this article through grinding colorless waste glasses respectively 1,2,3,4,5,6,7,8,10,20, 30 min, then calculate the fineness modulus and fractal dimension of waste glass powder, it is concluded that with the extension of grinding time the fineness modulus of the waste glass powder show the trend of decreasing first then increasing and decreasing again in last, and it is mainly decided by the cumulative sieve residual value of different particle size. The fractal dimension of waste glass powder show the trend of increasing first then decreasing and increasing again in last, and it is mainly decided by the particle size, surface morphology and structure loose degree of the waste glass powder.
摘要:
This paper mainly focuses on the affect factors of ductility of reinforced concrete pier with the high-strength longitudinal reinforcement and stirrups. By finite element software ANSYS, changed the amount of longitudinal reinforcement and high-strength stirrups in the piers, the ductility performance of concrete piers was studied. The results show that under certain conditions, the ductility coefficient of concrete piers with high-strength reinforcement can increase with the amount of stirrups. In addition, high-strength longitudinal reinforcement can improve the ductility performance of the concrete piers, but it should be controlled in a reasonable range. If there are too much high-strength longitudinal reinforcement in the concrete piers, the ductility performance will be lower, and structural seismic performance will also be affected.
通讯机构:
[Gao, Wentao] U;Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
会议名称:
3rd International Conference on Civil Engineering and Transportation (ICCET 2013)
会议时间:
DEC 14-15, 2013
会议地点:
Kunming, PEOPLES R CHINA
会议主办单位:
[Gao, Wentao;Luo, Qinghai;Li, Gaofeng;Xiao, Shenghao] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称:
Applied Mechanics and Materials
关键词:
Thermoelectric cooling;Chip cooling;Hot surface analysis;Finite element method
摘要:
On the basis of analysis of the principle of thermoelectric refrigeration and the research on the thermoelectric refrigeration technology and the thermal theoretical analysis of electronic components by domestic and foreign scholars, research on thermoelectric cooling of the uniform heat packaging surface from both the surface integral heat radiating and the local hot spot cooling of the chip by finite element numerical simulation and cooling both the chip and the heat from the whole surface of the local hot spots, using the finite element method of numerical simulation techniques Package uniform surface heat thermoelectric cooling study found the thermoelectric cooling hot surfaces in a uniform local cooling effect and temperature distribution, and pointed out that the chip thermoelectric cooling and thermal design layout surface will be in the future to improve the electroniccomponents of a hot heat important research direction.
期刊:
Applied Mechanics and Materials,2014年662:141-146 ISSN:1660-9336
通讯作者:
Fan, Shuai
作者机构:
[Wang, Jingsong; Fan, Shuai] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.;[Guo, Qingwei] MEP, South China Inst Environm Sci, Guangzhou, Peoples R China.;[Sun, Ping; Zhang, Weiming] Nanjing Univ, Sch Environm, Nanjing 210046, Peoples R China.
通讯机构:
[Fan, Shuai] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
International Conference on Mechanical Engineering, Civil Engineering and Material Engineering
会议时间:
20140927-28
会议地点:
Wuhan
会议主办单位:
[Fan, Shuai;Wang, Jingsong] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.^[Guo, Qingwei] MEP, South China Inst Environm Sci, Guangzhou, Peoples R China.^[Zhang, Weiming;Sun, Ping] Nanjing Univ, Sch Environm, Nanjing 210046, Peoples R China.
会议论文集名称:
Mechanical engineering, materials and information technology II: Selected, peer reviewed papers from the 2014 2nd International Conference on Mechanical Engineering, Civil Engineering andaterial Engineering (MECEM 2014), September 27-28, 2014, Wuhan, China
作者机构:
[Xiao, Rencheng; Liu, Jianjun; Liu, Wei] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.;[Xie, Feiyue] ShenZhen WuYe Int Architectural Design LTD, Hengyang Xianglin Branch, Hengyang, Hunan, Peoples R China.
通讯机构:
[Liu, Jianjun] U;Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
会议名称:
International Conference on Materials, Mechanical and Manufacturing Engineering (IC3ME 2013)
会议时间:
OCT 19-20, 2013
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Liu, Jianjun;Xiao, Rencheng;Liu, Wei] Univ South China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.^[Xie, Feiyue] ShenZhen WuYe Int Architectural Design LTD, Hengyang Xianglin Branch, Hengyang, Hunan, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Ambient excitation;Dynamic stiffness;Modal parameter identification;Reinforcement;Stone cutting machine foundation
摘要:
This paper introduces the modal parameter identification method of a reinforced concrete block foundation under ambient excitation. On this basis, the dynamic characteristics of a stone cutting machine foundation are obtained by modal test under different operating conditions, and test results reveal that the main cause of abnormal vibration lies in lower dynamic stiffness of the whole structure. With the comparison of dynamic response between pre-reinforcement and post-reinforcement, reinforcement effects of high pressure grouting technique and pre-stressed bolt applied to restrain foundation vibration are verified effectively.
期刊:
Applied Mechanics and Materials,2014年501-504:2348-2351 ISSN:1660-9336
通讯作者:
Liu, Huan
作者机构:
[Xie, Shuibo; Liu, Huan; Huang, Xiaojia] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
通讯机构:
[Liu, Huan] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
3rd International Conference on Civil Engineering and Transportation (ICCET 2013)
会议时间:
DEC 14-15, 2013
会议地点:
Kunming, PEOPLES R CHINA
会议主办单位:
[Liu, Huan;Huang, Xiaojia;Xie, Shuibo] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称:
Applied Mechanics and Materials
关键词:
reliability;automatic fire sprinkler system;fire water supply system;water-supply mode
摘要:
The reliability models and calculation of fire water supply system was introduced to analyze the reliability of four water-supply modes of automatic fire sprinkler system in high-rise buildings. Study results showed that the reliability of fire pump parallel connected system is the highest, which consists with the provision of the code for design of water extinguishing system of civil buildings when the building height is less than or equal to 120 meters. And the methods of improving reliability of fire water supply system were concluded, which benefitted the optimal design of automatic fire sprinkler system.
作者机构:
[Gui, Rong; Liu, Yong; Zhang, Zhijun; Wang, Jie] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
通讯机构:
[Liu, Yong] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称:
International Conference on Materials, Mechanical and Manufacturing Engineering (IC3ME 2013)
会议时间:
OCT 19-20, 2013
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Liu, Yong;Wang, Jie;Zhang, Zhijun;Gui, Rong] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称:
Advanced Materials Research
关键词:
Rainfall infiltration;Simulation;Stability;Tailing dam
摘要:
Flow-deformation coupled unsaturated soil model is built based on rainfall infiltration condition and modified Mohr-Coulomb failure criterion according to modeling a tailing dam with ABAQUS software. A few conclusions are obtained by adopting proper hydraulic curve soil water characteristic curve and compared with actually measures data. Studies yields provide foundations for simulation analysis on tailing dam on the condition of rainfall infiltration.